Proton exchange membrane surface base layer coating die head

Abstract

According to the technical scheme, the proton exchange membrane surface base layer coating die head comprises a left die body, a right die body and a gasket located between the left die body and the right die body which are vertically arranged, the left die body, the right die body and the gasket are connected into a whole through die locking screws, and a buffer groove is formed in the middle area of the inner side face of the right die body in the breadth direction. The gaskets are distributed on the upper portion, the left side and the right side of the buffer groove between the two die bodies, a feeding channel is formed in the middle of the top face of the right die body, the feeding channel penetrates into the right die body and then is communicated with the middle area of the buffer groove, and exhaust holes are vertically formed in the front side and the rear side of the top face of the right die body. The front exhaust hole and the rear exhaust hole are communicated with the top faces of the left end and the right end of the buffer groove respectively, an extrusion channel is formed between the two die bodies below the buffer groove under the guidance of the gasket, the thickness of the extrusion channel corresponds to the thickness of the gasket, and a die lip and a die lip gap fine adjustment mechanism are arranged at the lower end of the left die body. According to the invention, the coating thickness precision of the extrusion channel in different breadth directions can be ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating die, in particular to a proton exchange membrane surface base layer coating die. BACKGROUND

[0002] The surface of the proton exchange membrane needs to be coated with a catalytic base layer and a gas diffusion layer for producing a membrane electrode used in the process of producing hydrogen by electrolysis of water. The membrane electrode is composed of a proton exchange layer, a catalyst layer and a gas diffusion layer, the catalyst layer is coated on the substrate of a perfluorosulfonic acid membrane as a slurry, and the gas diffusion layer is coated on carbon paper.

[0003] The current die is limited by the machining capability, the straightness and flatness of the lip and the flatness of the gasket, and it is difficult to achieve the ideal state, which has a small error, causing a small deformation at the lip and affecting the uniformity and precision of the coating thickness. SUMMARY

[0004] In view of the above problems, the present application aims to provide a proton exchange membrane surface base layer coating die which can ensure the uniformity of the coating thickness of the extrusion channel in different width directions and ensure the quality of the extruded product.

[0005] The technical scheme of the present application is a proton exchange membrane surface base layer coating die, characterized in that it comprises a left die body, a right die body arranged vertically and a gasket located between the two, the three are connected as a whole by locking screws, a buffer groove is formed in the middle region of the inner side of the right die body along the width direction, the gasket is distributed in the upper part and the left and right side regions of the buffer groove between the two die bodies, a feeding channel is formed in the middle part of the top surface of the right die body, the feeding channel communicates with the middle part of the buffer groove after penetrating into the interior of the right die body, exhaust holes are vertically arranged on the front and rear sides of the top surface of the right die body, the two exhaust holes respectively communicate with the top surface of the left and right end parts of the buffer groove, an extrusion channel is formed between the two die bodies below the buffer groove under the guidance of the gasket, the thickness of the extrusion channel corresponds to the thickness of the gasket, and a die lip and a die lip gap fine adjustment mechanism are arranged at the lower end of the left die body.

[0006] Preferably, the top surface of the right die body is provided with two left and right hinge frames, the top surface of the left die body is provided with a hinge seat corresponding to the position of the hinge frame, the hinge seat is hinged on the hinge frame through a hinge shaft, a pull rod extends out of the left side of the hinge seat, and upward pulling of the pull rod causes the left die body to flip upward and open relative to the right die body through the principle of lever.

[0007] Preferably, the top surfaces of the left and right die bodies are respectively connected with locking modules, and the two die bodies are locked through two left and right screws respectively connected with the top surfaces of the left and right die bodies on the locking modules.

[0008] Preferably, the die lip gap fine adjustment mechanism includes a deformation groove disposed on the front side of the left die body, a threaded mounting hole located on the upper left side of the deformation groove, an adjusting nut threadedly connected in the threaded mounting hole, and an adjusting screw threadedly connected in the inner hole of the adjusting nut. The external thread pitch of the adjusting nut is greater than the internal thread pitch. The front end of the adjusting screw passes through the deformation groove and is threadedly connected to the die lip. Rotating the adjusting nut causes the adjusting screw to move forward or backward through thread differential, thereby deforming the die lip and adjusting the gap of the extrusion channel.

[0009] This invention can ensure the coating thickness accuracy of the extrusion channel in different width directions, and remove air mixed in the raw material to eliminate bubbles. The left mold body can be rotated open after the mold locking screws and locking module are removed. Attached Figure Description

[0010] Fig. 1 This is a schematic diagram of the structure of the present invention;

[0011] Fig. 2 This is an exploded view of the present invention;

[0012] Fig. 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0013] Wherein: 1—Left mold body; 1a—Mold lip; 1b—Deformation groove; 1c—Threaded mounting hole; 2—Right mold body; 21—Buffer groove; 22—Feed channel; 23—Ventilation hole; 3—Shim; 4—Mold locking screw; 5—Extrusion channel; 6—Mold lip gap fine adjustment mechanism; 61—Adjusting nut; 62—Adjusting screw; 7—Hinge frame; 8—Hinge seat; 9—Hinge shaft; 10—Tie rod; 11—Locking module. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] like Figs. 1 to 3 As shown, the present invention provides a proton exchange membrane surface base coating die head, including a vertically arranged left die body 1, a right die body 2, and a gasket 3 located between the two. The three are connected as one unit by a die-locking screw 4. A buffer groove 21 is formed in the middle area of ​​the inner side of the right die body 2 along the width direction. The gasket 3 is distributed in the upper part and the left and right sides of the buffer groove 21 between the two die bodies. A feeding channel 22 is formed in the middle of the top surface of the right die body 2. The feeding channel 22 passes into the interior of the right die body 2 and communicates with the middle area of ​​the buffer groove 21. The front and rear sides of the top surface of the right die body 2 are vertically provided with vent holes 23. The front and rear vent holes 23 are respectively connected to the top surface of the left and right ends of the buffer groove 21. An extrusion channel 5 is formed between the two die bodies below the buffer groove 21 under the guidance of the gasket 3. The thickness of the extrusion channel 5 corresponds to the thickness of the gasket 3. A die lip 1a and a die lip gap fine adjustment mechanism 6 are provided at the lower end of the left die body 1.

[0016] In the above scheme, the right die body 2 top surface is provided with left and right two hinged frames 7, the left die body 1 top surface is provided with a hinged seat 8 corresponding to the hinged frame 7 position, the hinged seat 8 is hinged on the hinged frame 7 through a hinge shaft 9, the hinged seat 8 extends out a pull rod 10 on the left side, and upward pulling of the pull rod 10 makes the left die body 1 flip open upward along the hinge shaft 9 relative to the right die body 2 through the lever principle.

[0017] Specifically, the left die body 1 and the right die body 2 top surface left and right two areas are respectively connected with a locking module 11, and the locking module 11 is connected with the left die body 1 and the right die body 2 top surface through two screws respectively to lock the two die bodies.

[0018] Further, the die lip gap fine adjustment mechanism 6 includes a deformation groove 1b arranged on the front side of the left die body 1, a threaded mounting hole 1c located on the upper left side of the deformation groove 1b, an adjusting nut 61 threaded connected in the threaded mounting hole 1c, and an adjusting screw 62 threaded connected in the inner hole of the adjusting nut 61. The outer thread pitch of the adjusting nut 61 is larger than the inner thread pitch. The front end of the adjusting screw 62 is threaded connected at the die lip 1a after passing through the deformation groove 1b. Rotating the adjusting nut 61 causes the adjusting screw 62 to advance or retreat through the differential thread, which causes the die lip 1a to deform, thereby adjusting the gap of the extrusion channel 5. The outer thread pitch of the adjusting nut 51 is m, and the inner thread pitch is n. Rotating the adjusting nut 51 by one turn causes the adjusting screw 52 to move forward or backward by a distance of m-n.

[0019] In the present application, the raw material enters from the middle of the top surface of the right die body 2 through the feeding channel 22, spreads in the forward and backward width directions in the buffer groove 21, and finally fills the entire buffer groove 21. In this process, air is discharged downward through the discharge channel and through the exhaust hole 23. After passing through the buffer groove 21, the speed vectors of the raw material flowing downward at different positions in the width direction tend to be consistent, ensuring uniform extrusion of the raw material in the entire width direction. Finally, the extrusion channel 5 uniformly coats the substrate through the lip gap, forming a dense coating. In the extrusion process, air bubbles mixed in the raw material are promptly discharged through the exhaust hole 23. The gap of the extrusion channel 5 is adjusted by rotating the adjusting nut 61, which causes the adjusting screw 62 to advance or retreat through the differential thread, thereby adjusting the size of the extrusion channel 5 gap. When disassembling the mold, only the locking screw 4 and the locking module 11 need to be removed, and the pull rod 10 is pulled outward, which makes the left die body 1 flip open upward along the hinge shaft 9 relative to the right die body 2 through the lever principle.

[0020] The above is only a preferred embodiment of the present application, and does not limit the application in any form. Any simple modification, equivalent change or modification made according to the technical principles of the present application to the above embodiments still falls within the scope of the present application.

Claims

1. A proton exchange membrane surface sublayer coating die characterized by: The utility model provides a vertical arrangement left mould body (1), right mould body (2) and the gasket (3) between both, above-mentioned three are connected as a whole through mould locking screw (4), the inside surface middle area of right mould body (2) is provided with buffer groove (21) along the width direction, gasket (3) is distributed in the upper portion and left and right side area of buffer groove (21) between two mould bodies, the top middle part of right mould body (2) is provided with feed channel (22), feed channel (22) is communicated with the middle area of buffer groove (21) after going into right mould body (2) inside, the top front and back side of right mould body (2) is provided with exhaust hole (23) vertically, and the top of the left and right end of buffer groove (21) is communicated with respectively, the two mould bodies between the buffer groove (21) below are formed extrusion channel (5) under the guidance of gasket (3), and the thickness of extrusion channel (5) corresponds with the thickness of gasket (3), and the lower end of left mould body (1) is provided with mould lip (1a) and mould lip gap fine adjustment mechanism (6).

2. A surface base layer coating die for a proton exchange membrane according to claim 1, characterized in that: The top of right mould body (2) is provided with left and right two hinged frames (7), the top of left mould body (1) is provided with hinged seat (8) corresponding hinged frame (7) position, hinged seat (8) is hinged on hinged frame (7) through hinged shaft (9), the left side of hinged seat (8) extends pull rod (10), and the left mould body (1) is turned up and opened along hinged shaft (9) relative right mould body (2) by pulling pull rod (10) upward through lever principle.

3. A surface base layer coating die for a proton exchange membrane according to claim 1, wherein: The top left and right areas of left mould body (1) and right mould body (2) are connected with locking module (11) respectively, and the two moulds are locked by connecting locking module (11) on the top of left mould body (1) and right mould body (2) through left and right two screws respectively.

4. A surface base coating die for a proton exchange membrane according to claim 1, wherein: The mould lip gap fine adjustment mechanism (6) includes the deformation groove (1b) of being provided in the front side of left mould body (1), the threaded mounting hole (1c) of being located in the left upper side of deformation groove (1b), the adjusting nut (61) of being screwed in threaded mounting hole (1c), the adjusting screw (62) of being screwed in the inner hole of adjusting nut (61), the outer thread pitch of adjusting nut (61) is greater than the inner thread pitch, the front end of adjusting screw (62) is screwed in mould lip (1a) after passing through deformation groove (1b), and the deformation of mould lip (1a) is formed by the screw thread differential of rotating adjusting nut (61) and the forward or backward movement of adjusting screw (62), and then the gap of extrusion channel (5) is adjusted.

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